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Consider it a convention. Basically, it doesn't make much sense to register many more digits after a digit that is uncertain. Another common convention is to enclose uncertain digits - often the last two digits shown - in parentheses, for example, 6.67384(80)×10−11 for the gravitational constant in SI units.,

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Q: Why is the last significant digit recorded in measurement uncertain?
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Related questions

What term refers to all the certain digits and one uncertain digit in a measurement?

A term Significant Figure refers to all the certain digits and one uncertain digit in a measurement.


What is the difference between a certain and an uncertain digit in a measurement?

One is certain and the other in uncertain.


What is the first uncertain digit in any measurement?

the last number.


What is meant by significant figure of a measurement?

A significant figure in a measurement is a digit that carries meaning contributing to its precision. It includes all the certain digits plus the first uncertain digit. The number of significant figures indicates the precision of the measurement.


In the maesurement 43.52 cm which digit is the most uncertain?

43.52 centimeters (cm) has four significant figures. The final figure in place four of '2' is the most uncertain. This is because the measurement device or calculation may have originally been 43.516 through 43.519 before rounding or due to instrumentation uncertainty.


What do the significant in a measurement include?

The significant figures in a measurement include all digits measured exactly, plus one estimated digit.


How many estimated digits are recorded as part of a measurement?

Your measurement should include one estimated digit.


How many uncertain digits are present when some quantity is expressed in significant digit figures?

At most 1.


What concludes the number of significant figures that should be maintain in recording the measurement?

The number of significant figures in a measurement is determined by the precision of the measuring instrument. Include all certain digits plus one uncertain digit (estimated or interpolated). Nonzero digits, zeros between nonzero digits, and trailing zeros in numbers containing a decimal point are considered significant.


What is the number of significant figures in measurement 77.09 meters?

There are four significant figures in the measurement 77.09 meters. Each non-zero digit and any zeros between them are considered significant.


All the digits known with certainly plus one final digit which is somewhat uncertain or is estimated?

significant figures


How many significant digit are in the measurement 2.00?

3 - assuming the trailing 0s are there for a reason.